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J. JOGHUM.

METHOD OF OPERATING CARS ON CABLE RAILROADS.

Patented Nov. 20,

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WITNESSE5= New STATES PATENT Fries.

JOHN J OGHUM, OF BROOKLYN, NEW YORK.

METHOD OF OPERATING CARS ON CABLE RAILROADS.

SPECIFICATION forming part of Letters Patent No. 288,815, dated November 20, 1883.

Application filed October 8, 1883. (No model.)

To all whom it may concern Be it known that I, JOHN J ocHUM, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Operating Cars on Cable Roads; and I do declare that the following is a full, clear, and exact description of the invention, which. will enable others skilled in the art to which it appertains to apply and use the same. 7 In the annexed drawings, Figure 1 represents a side view of a car, 0, and locomotive B after the car has been switched into position over the cable A, which is in motion in the direction shown by the arrow adjoining the main cable-pulley. (Shown at H.) The car-track is designated by the letter F. One of the guide-pulleys upon which the cable travels is shown at G.

Heretofore the practice has been to detach the locomotive when the cars have been switched into position over the cable, as shown in the drawings, leaving the cars standing niotionless upon the track. The moving cable is then adjusted between the grips D, which at this stage of operation are slightly brought together merely to hold the cable in position between them to prevent it from falling out until the cars are to be started. The grips are then tightened upon the cable by the hand-whcel E sufficiently to impart the motion of the cable to the cars. The enormous amount of frictionrequired between the grips and cable to overcome the inertia of the loaded and motionless cars occasions the abrasion and speedy destruction of the grips, which before being used stand somewhat apart, as shown in Fig. 2, but after being applied a few times are so worn that the grips impinge upon each, as shown in Fig. 3, thereby losing their hold upon the cable and allowing it to slip through the grips, in consequence of which they require to be frequently renewed at a considerable expense and loss of time.

The object of myinvention is to obviate the destructive effects occasioned by starting the cars by means of the grips while the cars are standing still.

To carry out my invention, instead of withdrawing the locomotive when the cars have been switched into position over the cable, I

uncouple them and allow the locomotive to stand against the rear end of the cars, so that when the cars are to be started the power of the locomotive is applied to set the cars in motion before the grips are tightened upon the cable, and as soon as the cars have acquired the desired momentum from the locomotive the grips are tightened upon the cable, both the grips and cable being employed merely to continue the motion given to the cars by the locomotive, which is then withdrawn and used to switch other cars into position and overcome their inertia in like manner. It will be seen that by this application of the locomotive both the cable and grips are relieved of the destructive strain and friction occasioned by using them to overcome the inertia of the motionless cars, instead of using them merely to continue the motion imparted to the cars by the locomotive, as carried out in my improvement, by which the cable may be operated at a higher veloc ity without damage to the grips or cable, and overcoming one of the most serious difiiculties in cable-railroading.

Any desired form of grip. mechanism may be used, and any well-known motor may be substituted for the locomotive shown and described.

It will be observed that the locomotive serves simply to start the stationary car, and to put the car which is provided with the loose grip mechanism in motion until it attains a speed approximately that of the continually-moving but still independent cable, which is impelled by means of an independ ent engine. After the locomotive has been withdrawn and the cars and cable are moving in the same direction, but are still entirely independent, the one from the other, the loose 7 grip system now in use, the wear of the clamp,

caused by the application of a stationary grip and moving cable, being obviated by my use of a moving grip and an independently-moving cable.

Having thus described my invention, what I desire to claim and secure by Letters Patent is- The combination, with a stationary oar progage with the independently moving cable vided with a grip mechanism adapted upon without any appreciable Wear of the clamp- 10 manipulation to engage with a cable, of a coning devices substantially as described. tinuously-moving cable, and of a locomotive I 5 or equivalent motor, adapted to start the car JOHN JOGHUM' in the direction of the moving cable and then \Vitnesses: to be disconnected from the same, whereby R. I. CORY, the loose grip mechanism is adapted to en- JOHN A. NEXSEN. 

